/* 经典版 — 顶栏全文检索（右侧圆形按钮，展开面板固定于顶栏下方） */

.header-tools {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  margin-left: auto;
}

.site-search {
  position: relative;
  flex-shrink: 0;
  width: 38px;
  height: 38px;
  z-index: 1301;
}

.site-search-trigger {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  border-radius: 50%;
  color: rgba(255, 255, 255, 0.92);
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.18);
  transition:
    opacity 0.22s ease,
    transform 0.28s cubic-bezier(0.4, 0, 0.2, 1),
    color 0.2s ease,
    background 0.2s ease,
    border-color 0.2s ease;
}

.site-header.scrolled .site-search-trigger {
  color: #5C6B7A;
  background: rgba(0, 91, 172, 0.06);
  border-color: rgba(0, 120, 193, 0.14);
}

.site-search-trigger:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.2);
  transform: translateY(-1px);
}

.site-header.scrolled .site-search-trigger:hover {
  color: #0078C1;
  background: rgba(0, 120, 193, 0.1);
}

.theme-classic3 .site-search-trigger {
  color: rgba(255, 255, 255, 0.95);
  background: rgba(255, 255, 255, 0.14);
  border-color: rgba(255, 255, 255, 0.22);
}

.theme-classic3 .site-header.scrolled .site-search-trigger {
  color: #8A4A50;
  background: rgba(217, 35, 46, 0.06);
  border-color: rgba(217, 35, 46, 0.14);
}

.theme-classic3 .site-header.scrolled .site-search-trigger:hover {
  color: #D9232E;
  background: rgba(217, 35, 46, 0.1);
}

.site-search.is-open .site-search-trigger {
  opacity: 0;
  transform: scale(0.82);
  pointer-events: none;
}

.site-search-form {
  position: fixed;
  top: calc((var(--header-h) - 40px) / 2);
  right: max(16px, calc((100vw - min(1200px, 92vw)) / 2));
  display: flex;
  align-items: stretch;
  height: 40px;
  width: min(300px, calc(100vw - 48px));
  opacity: 0;
  visibility: hidden;
  overflow: hidden;
  pointer-events: none;
  background: #fff;
  border-radius: 100px;
  box-shadow: 0 8px 24px rgba(0, 40, 80, 0.16);
  transform: translateX(12px) scale(0.96);
  transform-origin: center right;
  transition:
    opacity 0.24s ease,
    transform 0.28s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 1302;
}

.site-search.is-open .site-search-form {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(0) scale(1);
}

body .site-search.is-open > .site-search-form {
  opacity: 1 !important;
  visibility: visible !important;
  pointer-events: auto !important;
  transform: translateX(0) scale(1) !important;
  transition: none !important;
}

.site-search-field {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1;
  min-width: 0;
  padding: 0 14px;
}

.site-search-icon {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  color: #9AA8B5;
}

.site-search-input {
  flex: 1;
  min-width: 0;
  border: 0;
  background: transparent;
  font-size: 0.88rem;
  color: var(--color-text);
  outline: none;
}

.site-search-input::placeholder {
  color: #B0BEC5;
}

.site-search-clear {
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 0.68rem;
  color: #7A8A99;
  background: rgba(0, 91, 172, 0.08);
}

.site-search-submit {
  flex-shrink: 0;
  padding: 0 18px;
  font-size: 0.88rem;
  font-weight: 600;
  color: #fff;
  background: var(--gradient-sph);
  transition: filter 0.2s ease;
}

.site-search-submit:hover {
  filter: brightness(1.06);
}

.site-search-dropdown {
  position: fixed;
  top: calc(var(--header-h) + 6px);
  right: max(16px, calc((100vw - min(1200px, 92vw)) / 2));
  width: min(380px, calc(100vw - 32px));
  z-index: 1302;
  padding: 8px;
  border-radius: 14px;
  background: #fff;
  border: 1px solid rgba(0, 120, 193, 0.12);
  box-shadow: 0 16px 40px rgba(0, 40, 80, 0.18);
}

.site-search-dropdown[hidden] {
  display: none;
}

.site-search-results {
  max-height: min(52vh, 420px);
  overflow: auto;
}

.site-search-result {
  display: block;
  padding: 12px 14px;
  border-radius: 12px;
  transition: background 0.2s ease;
}

.site-search-result:hover,
.site-search-result.is-active {
  background: rgba(0, 120, 193, 0.07);
}

.site-search-result__category {
  display: inline-block;
  margin-bottom: 4px;
  padding: 2px 8px;
  border-radius: 100px;
  font-size: 0.72rem;
  font-weight: 700;
  color: #0078C1;
  background: rgba(0, 120, 193, 0.08);
}

.site-search-result__title {
  display: block;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.4;
}

.site-search-result__snippet {
  display: block;
  margin-top: 4px;
  font-size: 0.84rem;
  color: var(--color-text-muted);
  line-height: 1.5;
}

.site-search-result__snippet mark {
  padding: 0 2px;
  border-radius: 3px;
  background: rgba(0, 160, 233, 0.18);
  color: #005BAC;
}

.site-search-empty {
  padding: 24px 14px;
  font-size: 0.9rem;
  color: var(--color-text-muted);
  text-align: center;
}

.theme-classic3 .site-search-form {
  box-shadow: 0 10px 32px rgba(217, 35, 46, 0.16);
}

.theme-classic3 .site-search-submit {
  background: linear-gradient(135deg, #EF4A54 0%, #D9232E 55%, #B81822 100%);
}

@media (max-width: 1100px) {
  .site-search-form {
    width: min(260px, calc(100vw - 48px));
  }

  .site-search-submit {
    padding: 0 14px;
  }
}

@media (max-width: 960px) {
  .site-search-form,
  .site-search-dropdown {
    right: 16px;
  }

  .site-search-form {
    width: min(300px, calc(100vw - 32px));
  }

  .site-search-dropdown {
    width: min(360px, calc(100vw - 32px));
  }
}